China Calcined Mica Powder Suppliers - Quality Factory-Processed Mica for Superior Coatings and Industrial Applications

Calcined mica powder is a high-quality mica product manufactured in our China factory through a specialized heating process. By heating selected natural mica under controlled temperatures, we reduce volatile matter and surface impurities while preserving the mineral's unique layered structure. This calcination process significantly enhances the product's cleanliness, thermal stability, color consistency, and overall performance in various industrial applications. Mica, a natural silicate mineral known for its plate-like structure, provides calcined mica powder with outstanding properties such as heat resistance, electrical insulation, chemical stability, flexibility, low thermal conductivity, and excellent barrier performance. As a result, calcined mica is extensively utilized in coatings, plastics, rubber, welding materials, insulation products, refractory materials, construction materials, decorative finishes, and composite formulations. When compared to conventional natural mica powder, our calcined mica powder stands out with its cleaner appearance and superior heat-treated stability. It serves as an effective functional mineral filler, enhancing coating durability, surface texture, dimensional stability, anti-cracking performance, insulation capabilities, and thermal resistance. Coarse calcined mica flakes also offer a natural mineral texture and eye-catching flake effect for decorative applications. As a leading supplier in the industry, WANCHENG MINERAL delivers premium calcined mica powder and flakes to customers worldwide. In addition to our standard offerings, we proudly present a unique silver calcined mica grade, available in 10 mesh, 20 mesh, and 40 mesh. This specialized product showcases a stunning silver appearance after calcination, making it ideal for customers seeking visible silver mica flakes, decorative mineral textures, or distinctive surface effects in their coatings and building materials.

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Product Details

Chemical Composition Analysis

Chemical Component	Typical Content	Description
SiO₂	42% - 48%	Main silicate component
Al₂O₃	28% - 38%	Main alumina component
K₂O	7% - 11%	Typical mica alkali component
Fe₂O₃	1% - 6%	Affects color and mineral characteristics
MgO	0.5% - 3%	Minor component
CaO	≤ 2%	Minor component
Na₂O	≤ 1.5%	Minor alkali component
Loss on Ignition	Reduced after calcination	Depends on calcination process

Frequently Asked Questions

Q What are the primary chemical constituents in this composition?

The major constituents are Silicon Dioxide (SiO₂) ranging from 42% to 48% and Aluminum Oxide (Al₂O₃) ranging from 28% to 38%, which together form the core aluminosilicate mineral structure.

Q What role does Potassium Oxide (K₂O) play in the material?

With a content of 7% to 11%, K₂O is a characteristic interlayer alkali ion in the mica crystalline lattice, providing essential structural stability, flexibility, and high electrical insulation properties.

Q How does the Fe₂O₃ percentage influence the final mineral properties?

Iron Oxide (Fe₂O₃) content of 1% to 6% directly influences the visual color profile, tone, and specific mineral characteristics of the calcined material across various applications.

Q Why is Loss on Ignition (LOI) reduced after calcination?

During the calcination process, structural hydroxyl groups and volatile substances are driven off at elevated temperatures, significantly reducing the LOI value and improving dimensional and thermal stability.

Q Are minor trace elements like MgO, CaO, and Na₂O strictly controlled?

Yes, minor components such as MgO (0.5% - 3%), CaO (≤ 2%), and Na₂O (≤ 1.5%) are maintained at strictly low thresholds to preserve mineral purity and ensure consistent thermal and dielectric performance.

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